在 NetBeans 6.9 中找不到主类
每当我加载 NetBeans 6.9（以前的版本也发生类似错误）时，我让 NetBeans 完成扫描我的项目，完成后我尝试运行一个指向具有 main 方法的类的配置文件，NetBeans 总是说主类不是发现，即使一旦错误弹出它就会显示在类列表中。
如果我从列表中选择类并单击“确定”，则会再次发生相同的错误（找不到主类）。
如果我编译主类，我仍然遇到同样的问题。
我想如果我重建整个项目我仍然会遇到同样的问题。 ->当我编译主项目时，它会编译所有项目，甚至是那些已关闭的项目。 到底是怎么回事？
到目前为止，我发现解决此问题的唯一方法是关闭项目并重新打开它，然后等待项目扫描再次完成。
这非常烦人。有解决办法吗？
我注意到的另一个奇怪的事情是，我的项目似乎构建到了错误的 JAR 文件名中（尽管如果我执行上述关闭并重新打开项目的步骤，它仍然有效）。我有两个具有不同名称的项目，即使在多次关闭另一个项目并重新启动 NetBeans 后，当我构建第一个项目时，它仍使用已关闭很长时间的第二个项目的 JAR 文件名。
Whenever I load NetBeans 6.9 (similar errors happened on previous versions also) then I let NetBeans finish scanning my projects and once it's done I try to run a profile which points to a class with a main method, NetBeans always says the main class is not found, even though it shows up in the list of classes once the error pops up.
If I select the class from the list and hit OK, the same error happens again (main class not found).
If I compile the main class, I still get the same problem.
I think I still get the same issue if I rebuild the entire project.
-> when I compile the main project it compiles all projects, even those that are closed.
What is going on?
The only way I have found so far to work around this is to close the project and re-open it and wait for the project scan to finish again.
This is incredibly annoying. Is there a fix for this?
Another strange thing I noticed is that my project seems to be building into the wrong JAR file name (though if I do the above step of closing and reopening the project it still works). I have two projects with different names, and even after having closed the other project and restarted NetBeans a lot of times, when I build the first project it uses the JAR file name for the second project that has been closed for a long time.
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我通过删除 NetBeans 的缓存修复了非常相似的行为。删除文件夹
User\.netbeans\6.9\var\cache\index\。Windows 7 和 Netbeans 7.2：
用户\应用程序数据\本地\NetBeans\缓存\7.2\索引
I fixed a very similar behaviour by deleting NetBeans's cache. Delete the folder
User\.netbeans\6.9\var\cache\index\.Windows 7 and Netbeans 7.2:
User\AppData\Local\NetBeans\Cache\7.2\index
我没有阅读完整的问题，但尝试：右键单击项目>属性>运行>浏览主类，
否则尝试创建一个新项目，然后将
scr文件夹从旧项目复制到新项目。I didn't read the complete question, but try: Right click project > properties > run > browse for main class
Else try making a new project and then copy the
scrfolder from the old one to the new project.对于 Windows 8
删除此目录 C:\Users\Shubham\AppData\Local\NetBeans\Cache
在执行此操作之前关闭 netbeans。
再次启动 Netbeans 并让它读取该项目。
测试项目。运行项目。它应该工作正常。
For windows 8
Delete this directory C:\Users\Shubham\AppData\Local\NetBeans\Cache
Before doing so close netbeans.
Start Netbeans again and let it read the project.
Test project. Run project. It should work fine.